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2. Sign-on and sign-off - Wikipedia

   en.wikipedia.org/wiki/Sign-on_and_sign-off

   Some broadcasters that have ceased signing on and signing off in favour of 24-hour broadcasting may perform a sign-off sequence at a certain time in the night (usually between 10:00 p.m. and 1:00 a.m.) as a formality to signify the end of its operating day (in the United States, the broadcast logging day ends at 12:00 midnight local time).

3. Test card - Wikipedia

   en.wikipedia.org/wiki/Test_card

   Test cards typically contain a set of patterns to enable television cameras and receivers to be adjusted to show the picture correctly (see SMPTE color bars).Most modern test cards include a set of calibrated color bars which will produce a characteristic pattern of "dot landings" on a vectorscope, allowing chroma and tint to be precisely adjusted between generations of videotape or network feeds.

4. Indian-head test pattern - Wikipedia

   en.wikipedia.org/wiki/Indian-head_test_pattern

   Nevertheless, the Indian-head test pattern persists as a symbol of early television. Many U.S. television stations chose the image of the Indian-head card to be their final image broadcast when their analog signals signed off for the final time between February 17 and June 12, 2009, as part of the digital television transition in the United States.

5. News, Politics, Sports, Mail & Latest Headlines - AOL.com

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   Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.

6. Premium Tech Support with Assist by AOL | AOL Products

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   Our tech experts know all about Windows PCs; Apple computers running Mac OS 10.6 and above; and any brand of smartphone (iPhone, Samsung, HTC), tablet (iPad, Kindle, Surface), or smart TV.

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9. Category : 24-hour television news channels by country

   en.wikipedia.org/wiki/Category:24-hour...

   24-hour television news channels in the United States (7 C, 72 P) This page was last edited on 18 October 2022, at 21:34 (UTC). Text is available under the Creative ...